Model investigations for vanadium-protein interactions. Synthetic, structural, and physical studies of vanadium(III) and oxovanadium(IV/V) complexes with amidate ligands
Φόρτωση...
Ημερομηνία
Συγγραφείς
Keramidas, A. D.
Papaioannou, A. B.
Vlahos, A.
Kabanos, T. A.
Bonas, G.
Makriyannis, A.
Rapropoulou, C. P.
Terzis, A.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
American Chemical Society
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Inorg Chem
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Reaction of the amide ligand N-[2-((2-pyridylmethylene)amino)phenyl]pyridine-2-carboxamide (Hcapca) with VCl3 affords the compound trans-[VCl2(capca)] (1), the first example of a vanadium(III) complex containing a vanadium-deprotonated amide nitrogen bond, while reaction of bis(pentane-2,4-dionato)oxovanadium(IV) with the related ligands N-[2-((2-phenolylmethylene)amino)phenyl] pyridine-2-carboxamide (H(2)phepca), 1-(2-hydroxybenzamido)-2-(2-pyridinecarboxamido)benz (H(3)hypyb), and 1,2-bis(2-hydroxybenzamido)benzene (H(4)hybeb) yields the complexes [VO(phepca)] (2), Na[VO(hypyb)]. 2CH(3)OH (4 . 2CH(3)OH), and Na-2[VO(hybeb)]. 3CH(3)OH (5 . 3CH(3)OH) respectively. The preparation of the complex {N-[2-((2-thiophenoylmethylene)amino)phenyl]pyridine 2-carboxamido}oxovanadium(IV) (3) has been achieved by reaction of N-(2-aminophenyl)pyridine-2-carboxamide and 2-mercaptobenzaldehyde with [VO(CH3COO)(2)](x). Oxidation of complex 5 . 3CH(3)OH with silver nitrate gives its vanadium(V) analogue (8 . CH3OH), which is readily converted to its corresponding tetraethylammonium salt. (10 . CH2Cl2) by a reaction with Et(4)NCl. The crystal structures of the octahedral 1 . CH3CN, and the square-pyramidal complexes 3, 4 . CH3CN, 5 . 2CH(3)OH, and 10 were demonstrated by X-ray diffraction analysis. Crystal data are as follows: 1 . CH3CN, C18H13Cl2N4OV . CH3CN M(r) = 464.23, monoclinic, P2(1)/n, a = 10.5991(7) Angstrom, b = 13.9981(7) Angstrom, c = 14.4021(7) Angstrom, beta = 98.649(2)degrees, V = 2112.5(3) Angstrom(3), Z = 4, R = 0.0323, and R(w) = 0.0335; 3, C19H13N3O2SV, M(r) = 398.34, monoclinic, P2(1)/n, a = 12.1108(10) Angstrom, b = 19.4439(18) Angstrom, c = 7.2351(7) Angstrom; beta = 103.012(3)degrees, V = 1660.0(4) Angstrom(3), Z = 4, R = 0.0355, and R(w) = 0.0376; 4 . CH3CN, C19H12N3O4VNa . CH3CN, M(r) = 461.31, monoclinic, P2(1)/c, a = 11.528(1) Angstrom, b = 11.209(1) Angstrom, c = 16.512(2) Angstrom, beta = 103.928(4)degrees, V = 2071.0(5) Angstrom(3), Z = 4, R = 0.0649, and R(w) = 0.0806; 5 . 2CH(3)OH, C20H10N2O5VNa2 . 2CH(3)OH, M(r) = 519.31, triclinic, P1, a = 12.839(1) Angstrom, b = 8.334(1) Angstrom, 12.201(1) Angstrom, alpha = 106.492(2)degrees, beta = 105.408(2)degrees, gamma = 73.465(2)degrees, V = 1175.6(3) Angstrom(3), Z = 2, R = 0.0894, and R(w) = 0.1043; 10, C28H32N3O5V M(r) = 541.52, monoclinic, P2(1)/c, a = 11.711(3) Angstrom, b = 18.554(5) Angstrom, c = 12.335(3) Angstrom, beta = 95.947(9)degrees, V = 2666(2) Angstrom(3), Z = 4, R = 0.0904, and R(w) = 0.0879. In addition to the synthesis and crystallographic studies, we report the optical, infrared, magnetic, and electrochemical properties of these complexes. Electron paramagnetic resonance [of oxovanadium(IV) species] and H-1, C-13{H-1}, and V-51 nuclear magnetic resonance [of oxovanadium(V) complex] properties are reported as well. This study represents the firsr systematic study of vanadium(III), (VO2+)-O-IV, and (VO3+)-O-V species containing a vanadium-deprotonated amide nitrogen bond.
Περιγραφή
Λέξεις-κλειδιά
v-51 nmr-spectroscopy, crystal-structure, myosin subfragment-1, biological-systems, binding-sites, vanadate, photocleavage, peptides, bond
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://A1996TR24000017
http://pubs.acs.org/doi/pdfplus/10.1021/ic9503803
http://pubs.acs.org/doi/pdfplus/10.1021/ic9503803
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας